Airtac MSK Multi-position Locking Cylinder MSK25X20
The AirTAC Airtac MSK Multi-position Locking Cylinder MSK25X20 is a genuine MK multi-mount cylinder (single acting, push type), 25 mm bore. Its compact square body fixes from six directions and mounts side by side to save space. It delivers about 179.1 N of push force at 0.5 MPa. A bumper cushions the impact. As an MK unit a fixed rod stops the piston rod rotating.
- TypeMulti-mount, single acting, push type
- SeriesMK (no-rotating)
- Bore25 mm
- Push thrust @0.5 MPa179.1 N
- Operating pressure0.2 - 1.0 MPa (28 - 145 psi)
- Port sizeM5x0.8
- CushionBumper
- MagnetWithout magnet
- ThreadPT
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac MSK Multi-position Locking Cylinder MSK25X20
This MSK25X20 is an AirTAC MK-family no-rotating multi-mount cylinder. The compact square body fixes from 6 directions (front, back, left, right, top, bottom) and mounts side by side, so multiple cylinders can be packed onto one plate without wasting pitch space. Magnetic-switch slots are machined around the body. It is single acting, push type: air pressure drives the 25mm rod out with a theoretical push thrust of 179.1 N at 0.5 MPa, and the 20mm stroke is the longest available on single-acting MK bodies. Cushioning is a bumper, and the high guide precision means no added lubricant is required.
You are buying a genuine AirTAC part from the MK no-rotating series, which uses a fixed rod, plate and brass bushing to stop the piston rod from turning - choose MD when rod rotation is acceptable. This SKU has no trailing S, so it is supplied WITHOUT a magnet; the magnet is optional on MD/MK, never a default. Operating range is 0.2-1.0 MPa (28-145 psi) with 1.5 MPa proof pressure. Dimensions are per stroke, so confirm exact envelope sizing from the datasheet - we can send it on request.
Airtac MSK Multi-position Locking Cylinder MSK25X20 Technical Specifications
| Model | Airtac MSK Multi-position Locking Cylinder MSK25X20 |
|---|---|
| Type | Multi-mount cylinder, single acting, push type |
| Series | MK (no-rotating) |
| Bore | 25 mm |
| Push thrust @0.5 MPa | 179.1 N |
| Port size | M5x0.8 (PT thread) |
| Magnet | Without magnet |
| Fluid | Air, filtered to 40 um |
|---|---|
| Operating pressure | 0.2 - 1.0 MPa (28 - 145 psi) |
| Proof pressure | 1.5 MPa (215 psi) |
| Temperature | -20 to 70 C |
| Speed range | 50 - 500 mm/s |
| Cushion | Bumper |
| Mounting | Fix from 6 directions; mountable side by side |
Specifications follow the official AirTAC MD/MK multi-mount data. The front cover and piston are short, so avoid an over-long stroke. An optional high-temperature seal material extends the range to 0 to 150 C. Overall dimensions vary per stroke and allowable side-load is published as curves — ask us and we confirm from the datasheet.
How to choose
The 25mm bore gives a theoretical push thrust of 179.1 N at 0.5 MPa - step down to 16mm (70.4 N) or up if the datasheet offers a larger frame. Take MK over standard MD when the rod must not rotate. Acting type is the real fork here: double acting (MK) for powered return, single push (MSK, this SKU) for air-out/spring-return, single pull (MTK), double rod (MKD) or adjustable stroke (MKJ, adding a 10/20/30mm adjustable range). Single-acting strokes top out at 20mm, which is exactly what this SKU uses - the short cover cautions against over-long strokes. No trailing S means no magnet; select the S version if you need switch feedback. Threads are PT as listed, with G available.
Applications
Jig positioning
Bolted to the top or bottom of a weld or assembly jig, the non-rotating rod pushes a locating pin into position and retracts by spring return, so jigs sit closer together on the table.
Conveyor divert push
Side mounting on a conveyor rail lets the 20mm push stroke nudge small parcels or containers onto a side lane, with the bumper absorbing the contact cleanly.
Compact lift-assist stops
Fixed from above on a slide table, the rod pushes a workpiece up to a gauge height and lets it drop back on spring return, keeping the footprint tight between stations.
FAQ
Should I choose single acting push (MSK) or double acting (MK)?
MSK is single acting, push type: air extends the rod and a return spring retracts it, so it only uses air on the out-stroke and fails back safely when pressure is lost. The 25mm bore gives a theoretical push thrust of 179.1 N at 0.5 MPa. Double acting MK cylinders power both directions and handle longer strokes, but need two air lines. Pick MSK for short ejection, clamping or stopper jobs where a powered return is not needed.
Does this cylinder need lubrication, and where do I find exact dimensions?
No added lubricant is needed - the MK multi-mount design has high guide precision. The rod cannot rotate thanks to the fixed rod and no-rotating plate. For overall dimensions, note they change with stroke, so check the datasheet for the 20mm-stroke envelope rather than relying on generic figures; we can confirm or send the datasheet on request.